From: andy@warmcat.com (Andy Green)
To: linux-arm-kernel@lists.infradead.org
Subject: SPI, DMA and an i.MX31
Date: Tue, 22 Sep 2009 15:10:00 +0100 [thread overview]
Message-ID: <4AB8DAB8.801@warmcat.com> (raw)
In-Reply-To: <87077C4F48609F4392621D9F99DDE20901202E03@tesla.star.galaxy.io>
On 09/22/09 14:22, Somebody in the thread at some point said:
Hi Rene -
> After changing that my system booted smoothly. If I look in '/proc' there
> is a dir called 'sdma', and inside there is a file 'channels':
> $ cat channels
> Channel 0: MCU
>
> It seams to be alive :-)
>
>> Take a look at ./drivers/mmc/host/mxcmmc.c
>
> Next will try to test the mmc driver, but I don't have an MMC/SD slot on
> my board. Hopefully there is some sign of an MMC in the channels
> file or so.
Sounds encouraging... if you want to post or send a test patch if it
gets to that point I'll try to give it a go on a real SD Card.
At the moment event/0 which owns the PIO to the SD card eats most of the
CPU on a loaded system, this should be pretty revolutionary when it works.
-Andy
next prev parent reply other threads:[~2009-09-22 14:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-17 8:26 SPI, DMA and an i.MX31 Wolf, Rene, HRO-GP
[not found] ` <BLU105-W229F8F8F533B107510C600BAE10@phx.gbl>
2009-09-21 8:22 ` Wolf, Rene, HRO-GP
2009-09-21 18:04 ` Magnus Lilja
2009-09-22 2:44 ` Tonyliu
2009-09-22 9:00 ` Wolf, Rene, HRO-GP
2009-09-22 12:23 ` Andy Green
2009-09-22 13:22 ` Wolf, Rene, HRO-GP
2009-09-22 14:10 ` Andy Green [this message]
2009-09-22 14:09 ` Magnus Lilja
2009-09-22 16:22 ` Bill Gatliff
2009-09-22 19:45 ` Magnus Lilja
2009-09-24 10:51 ` Wolf, Rene, HRO-GP
2009-09-25 7:26 ` Andy Green
2009-10-01 10:42 ` Wolf, Rene, HRO-GP
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4AB8DAB8.801@warmcat.com \
--to=andy@warmcat.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).